Buran compressed air dryer from Donaldson prevents condensation

Donaldson Australasia has released a range of refrigeration-compressed air dryers suitable to industrial areas where compressed air is used to run the plant.

The Buran range is ideal for various industries including general manufacturing and processing, food sector, pharmaceutical and hospital.

By refrigerating compressed air, the Buran dries the air to prevent condensation and corrosion damage.

The dryer is in a robust metal housing equipped with electronic-level-controlled condensate drain and a dew point indicator.

An aluminium heat exchanger includes three functions in one: air-to-air heat exchanger, refrigerants-to-air heat exchanger, and water separator.

Because compressed air is generated by raising the pressure of large volumes of ambient air, it usually contains harmful substances such as dirt particles and moisture in the form of water vapour. The water vapour condenses and can lead to operational breakdowns and considerable costs.

Due to Buran’s new heat exchanger concept, pressure losses are reduced to a minimum and the operating costs are kept low throughout the whole lifetime.  The average pressure loss is 22 per cent lower than with traditional dryer ranges.

The unit has a user-friendly control panel for the monitoring of operating status. 

How the Buran works

The compressed air is fed into the dryer and pre-cooled in the air-to-air heat exchanger by the outgoing cold compressed air. The pre-cooled air then passes through the refrigerant-to-air heat exchanger where it is further cooled down to the required pressure dewpoint. The moisture in the compressed air condenses out and gathers and discharges automatically.

Finally, the cold discharged air is being reheated by the incoming compressed
air. This saves energy and prevents any moisture from forming beyond the dryer in the compressed air system. The cooling capacity of the refrigeration cycle is controlled by a hot gas bypass, which will assure secure functioning even during partial loading.

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